4.8 Article

Observable entanglement measure for mixed quantum states

Journal

PHYSICAL REVIEW LETTERS
Volume 98, Issue 14, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.98.140505

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We quantify an unknown mixed quantum state's entanglement by suitable, local parity measurements on its twofold copy. The associated observable qualifies as a generalized entanglement witness.

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